Computing-machine.



A. P. JOHNSON.

COMPUTING MACHINE.

APPLICATION IILED NOV. 2, 1907.

Patented Nov. 17,1908.

3 BHEETS -BHEET 1'.

FIG.

I FIG.2

I lNV ENTOR JMM WITNESSES. 2%? WM A. P. JOHNSON.

COMPUTING MACHINE.

APPLIOATION FILED NOV. 2, 1907.

903,984. Patented Nov. 17, 1908.

3 SHEETS-SHEET 2.

INVEQNTOR.

A. P. JOHNSON.

COMPUTING MACHINE.

APPLICATION FILED NOV. 2, 1907.

903,984. Patented Nov. 17, 1908.

'a sums-sum 3.

FIG. 10

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ALBERT F. JOHNSON, OF MCKEESPORT, PENNSYLVANIA.

COMPUTING-MACHINE Specification of Letters Patent.

Patented Nov. 17', 1908.

Application filed November 2, 1907. Serial No. 400,363.

.novel features hereinafter set forth and claimed.

In the drawings Figure 1 is a side elevation of my improved machine; Fig. 2 is a like view of same with the end portions shown in section; Fig. 3 is an end view; Fig.

4 is a section on the line 44 Fig. 2; Fig. 5 is a View of a portion of'the machine in section showing the manner in which the different cylinders are operated independently of each other; Fig. 6 is an enlarged detail showing the sight openings of the different cylinders registering with each other; Fig. 7 is a detail View of the stop pin; Fig. 8 is another detail of same; Fig. 9 is a view of the fraction cylinders in section; and .Fig. 10 is a diagrammatic view.

In the drawings the numeral 2designates suitable end frames which are supported by the feet 3. Secured to said end frames is the shell or casing 4. At opposite sides of the shell or casing 4 are the-sight openings 5, 5, extending longitudinally thereof. Above said sight openings 5, 5 are-the scales 6, 6 and 7, 7. Below said sight openings 5 are the scales 8, 8 and 9, 9. The shell or casing is further provided at opposite sides with the .sight openings 10 and 11. Mounted on bars 12 extending longitudinally of said frame on opposite sides thereof are the pointers 13 adapted to, slide along said bar, said pointers being provided with the sight holes 14; The sight-openings and scales'may be provided with magnifying glasses 10 to make the uu-- merals easily legible.

A shaft 15 extends through the shell 4, said shaft being supported by the end frames 2. Secured to the shaft 15 is the inuermost cylinder 16 which has a series of numerals arranged circumferentially thereon at one end thereof as well as longitudinally thereof. A like cylinder 17 surrounds the cylinder 16 and has the sleeves 18 through which the shaft 15 passes. Secured to the outer end of the shaft 15 is the clutch 19. A clutch 20 is secured by the set screws 21 to one of the sleeves 18, and on said sleeve interposed between the clutches 19 and 20 is the hand wheel 22 with clutch faces 23 and 24 adapted to engage the clutches 19 and 20, respectively. The hand wheel 22 being free to turn upon the sleeve 18 it is apparent that when the clutch 23 of the hand wheel is thrown into engagement with the clutch 19 the shaft 15 will be rotated and with it the cylinder 16 mounted thereon. If on the other hand the hand wheel 22 is thrown with its clutch face 24 into engagement with the clutch 20 on-the sleeve 18, then by turning said hand wheel the cylinder 17 Will be rotated. This cylinder 17 is also provided with the longitudinal sight opening 25, and like the cylinder 16 is provided with the numerals arranged as shown in Fig. 10.

A third cylinder 26 surrounds the cylinder 17 and has the sleeves 27 which encircle the sleeves 18 of the cylinder 17, and secured to one of said sleeves 27 is the clutch 28 secured thereto by the set screw 29. A hand-wheel 30 on the sleeve 27 has the clutch face 31 which is adapted to be thrown into engagement with the clutch 28 on the sleeve 27, said hand-wheel turning freely on the sleeve 27 when not in engagement with said clutch. The hand-wheel 30 has a clutch 32 which is adapted to be thrown into engagement with the clutch 33 on the sleeve 34 which is on the fourth or outer cylinder 35. The cylinder 26 is provided with the longitudinal sight opening 36 and the cylinder is provided with the sight opening 37. Both cylinders 26 and 3-5 have the numerals arranged as shown in Fig. 10.

To provide for the holding of the several cylinders sothat they may be operated independently of each other I provide a pin-38 which has a square shank passing through a square opening 39 in one of the end frames 2. This pin is provided with the knob 40 at its outer end and its inner end is adapted to engage recesses 41, 41 formed in the ring 42 of the spider 43 of the cylinder A spring 44 bearing against a pin 45 on the pin 38 and bearing against the end frame 2 acts to hold the pin 38 normally in engagement with the recess 41 to lock the cylinder 35 in position Secured and prevent its rotary movement. to the ring 42 of the cylinder 35 is the springcylinder 17. When ment with the recess .53 of the cylinder 17 the plate 46 which has the teat 47 adapted 'to engage the recess 48 formed in the ring 49 of the spider 50 of the cylinder 26. When this teat47 is in engagement 'with the recess 48 the sight opening of the outer cylinder 35 will register with the sight opening 36 of'the cylinder 26. .Mounted on the ring 49 of the spider 50 of the cylinder 26is a like springplate .51 which has a' teat 52 engaging a recess 53 in the ring 54 of the spider 55 of the the teat 52 is in engagesight opening 25 will register with the sight openings of the cylinders 26 and 35.

Mounted in the end frames 2 are the shafts 56 and mounted on said shaft is the roll '57 which is adapted to be turned by the handle 58, This roll 57 is provided with the numerals as indicated in Fig. 10. Surrounding this cylinder 57 is a cylinder 59 which has-the sleeve 60 to-which the knob 61 is secured by means of which said outer cylinder is rotated. This outer cylinder is provided with the sight openings 62 and with numerals as indicated in Fig. 10.

While'my invention may be used for many different purposes by merely changing the numerals on the different cylinders, l'will describe its practical operation with reference to the computing of wages.

Referring to Fig. 10 it will be observed that the outer cylinder 35 has the numerals .1, 2, 3, 4, 5, 6, 7, 8, 9, 10, &c., encircling it at one end thereof, and these numerals are to indicate the number of hours which the employee has worked. The numbers on this cylinder, for instance, run up to 109. The

- second cylinder '26 has like numerals arranged in the same way beginning with 110 and runnin up. The third and fourth cylinders continue these numbers in the same way. In addition to these numerals the cylinders are provided with the numerals indicating dollars and cents which extend longitudinally of the cylinder to be read through the sight opening 5 in the casing. The scales 6 and 7 indicate the amount earned per day, while the scales 8 and 9 indicate how much is earned per hour. The smaller cylinders 57 and 59 are for the purpose of computing fractional parts of an hour, and said cylinders have the, numerals 5, 10, 15and 20, &c., at theirends indicating the minutes, and extendin longitudinally thereof are the numbers'indicating the amounts earned'in the fractional parts of the hour.

In the operation of. the machine said machine is always so placed that the operator can revolve the cylinders with his left hand while with his right hand he is free to put down the computations upon a pad or other memorandum. For example, suppose that a man has worked four hours at 6 an hour, and it is desired to compute the amount per day, working on the basis of a ten-hour day.

The operator takes hold of thehand-wheel 30 and throws the clutch 32 into-engagement with the clutch 34 upon the sleeve of the cylinder 35. He then rotates the cylinder 35 until he brings the numeral 4 at the loft hand end of saidcylinder in such position that it can be seen through the sight opening 5. He then moves the pointer 13 until one of its apertures is opposite the numeral 6 in the scale 8. This will bring one of the open: ingsof the pointer opposite the numeral 24 on the cylinder 35, while the upper end of the pointer will have itsopening opposite the numeral .60 in the scale 6. This will show that the employee-is. earning at the rate of 60 per day, and for four hours he has earned 24. Suppose that he has worked in addition to the four hours, ten minutes. Then by turning the roll 59'until the numeral 10 appears through the sight opening 10 the pointer will indicate that he has earned for that extra ten minutes 1.

In the above manner the wages may be computed up to onehundred and six hours on the cylinder'35, but for any greater length of time the'cylinder 26. must be employed. Accordingly the cylinder '35 is moved around until its sight opening 37 is in alinement with the sight'opening 5 of the casing" and the pin 38 in engagement with the recess 41, whereupon the operator by throwing out the clutch 32 of the hand wheel 30 from engagement with the clutch 34, and

throwing the clutch 31 into engagement with the clutch 28, secures said hand wheel to the sleeve 27 of the cylinder 26. By-turning'the hand wheel 30 the cylinder 26 may be then rotated untilthe proper number is exposed through the sight opening of the cylinder, 35 and the casing, whereupon the computation may be made as before. Again, if it is desired to compute for a greater length of time 'thanthe hours contained on the cylinder 26 the computation is then made from the op-; posite side of the machine, whereupon the operator reverses the position of the machine, bringing the hand wheel 22 around to the left hand side where the operator may operate it with his left hand and still have his right hand free for jotting down the computation. The hand wheel 30 meanwhile is thrown to a neutral position where it does not engage'either of the clutches 28 or 34. Before doing this, however, the cylinder 35 must be rotated until the pin 38 engages the recess 41 which brings the sight opening 37 opposite thesight opening 5 of the casing. The operator then throws the hand wheel 30 into engagement with the clutch 28 whereupon the cylinder 26 is rotated until the teat 47 on the spring plate 46' engages the recess 48 on the cylinder 26, which locks the two cylinders 35 and 26 together with their sight openings 37 and 25 in alinement with each other. It is then that the hand wheel 30 is brought into thrown into a neutral position engaging neither clutch 28 nor 34, whereupon the operator grasps the hand wheel 22 and throws the clutch 2% into engagement with the clutch 20. By turning the hand wheel 22 the cylinder 17 is then free to rotate independently of-the cylinders and 26 which are held locked to the frame. In this manner the cylinder. 17 may be turned to any desired point to make the proper computation and when that has been accomplished and it is desired to use the cylinder 16 the cylinder 17 is turned until the teat 52 is engagement with the recess 53 on the cylinder 26, and when this has been done the sight openings of the cylinders 36, '26 and 17 will be in When; :t with each other as indicated in 6. Zhe operator then throws the hand wheel 22 into engagement with the clutch 19, whereupon the shaft 15 is rotated which carries the cylinder 16. In this manner therefore provision is made for rotating the different cylinders independently of each other so that a computation may be made from the innermost cylinder while the other cylinders remain locked. The disengagement of the locked cylinders may be readily accomplished by overcoming the pressure of the spring plates which hold the teats in engagement with the recesses and the operator can always tell when the engagement has taken place by the sound of the spring plate slipping into place.

By combiningtwo or more cylinders in the above manner one within the other and with sight openings at opposite sides the machine .is made very simple and compact whileat the same time its computing capacity 1S greatly increased. There are no parts to get out of order and by making the parts of light metal such as aluminum the weight of the machine may be reduced so as to make it easy to handle and lift about.

I do not wish to limit myself in any way to the exact construction illustrated, as the construction may be varied and modified without atl'ecting the broad scope of my invention.

'hat I claim is:

1. In a computing machine, the combination of a shell or casing having a sight-opening and a scale, two or more concentric rotary cylinders carrying numerals or other characters and having s1ght-open1ngs,a main shaft passing through said cylinders, sleeves on said cylinders, clutches on said sleeves and a hand wheel loosely mounted on said sleeves and having clutch faces adapted to engage the clutch face on said sleeve.

2. In a computing machine, the combination of a shell or casing having a sight-opening anda scale, two or more concentric rotary cylinders carrying numerals or other characters and having sight-openings, a shaft passing through said cylinders, sleeves on said cylinders through which said shaft passes, hand wheels on said sleeves at opposite ends of said shaft and clutches carried by said sleeves and shaft, whereby any one of said sleeves may be operated by one (if said wheels.

3. In a computing machine, the combination of a shell or casing having a sight-opening and scales at opposite sides thereof, a plurality of. rotary cylinders carrying numerals or other characters and having sightopemngs, means for locking two or more of said cylinders with their sight-openings in coincidence with each other, and means for rotating the free cylinders whereby the numerals of certainof said cylinders may be read from the sight openings on one side and the numerals of others from the sight openings on the opposite side.

4. In a computing machine, the combination of a shell or casing having a sight opening and a scale, two or more concentric cylinders carrying numerals or other characters andhaving sight openings, a main shaft passing through said cylinders, sleeves on said cylinders encircling said shaft, hand wheels at each end of said shaft and longitudinally movable thereon, one for turning certain of said cylinders and the other for turning the remainder, and whereby said hand wheels may be thrown into a neutral or inoperative position.

In testimony whereof I, the said ALBERT F. JoHNsoN, have hereunto set my hand.

v ALBERT F. JOHNSON. llnesses Rona". D. TOTTEN, M. D. Vocnn. 

